FIX: CLS-1066 Strange message from failing jobflow
FIX: CLS-1066 Strange message from failing jobflow

Provider context is preset even in Node.postExecute() and Node.free() and better error reporting.

git-svn-id: ea4e32a9c087aaafabd002c256df6ce060387585@13391 a09ad3ba-1a0f-0410-b1b9-c67202f10d70

CloverETL/CloverETL-Engine,CloverETL/CloverETL-Engine,CloverETL/CloverETL-Engine,CloverETL/CloverETL-Engine